Energetics Flashcards
1
Q
Hess’ law
A
Hess s law states that the heat change in a
reaction depends only on the nature of the reactants and products,
no matter what reaction route is followed
2
Q
enthalpy
A
The energy within a
system is referred to as the enthalpy and is denoted by the symbol
H.
3
Q
the enthalpy change
A
energy change in a reaction is called (triangle) H.
4
Q
chemical reactions
A
Chemical reactions involve bond breaking followed by bond making.
5
Q
bond making
A
bond making is
exothermic.
6
Q
bond breaking
A
Bond breaking is endothermic
7
Q
activation energy
A
the minimum
amount of energy needed to initiate the chemical reaction that is the minimum
amount of energy required to break the bonds of reactant molecules before new bonds are formed to make the product.
8
Q
A
